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Welcome back, my fellow
game developers.

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In this video, we are
going to be learning

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everything about
version control,

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source tree, and creating
repositories of our projects.

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So as you can see right here,

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we've created a new project

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and we've downloaded
source tree.

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We now have a couple
of commits in here,

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and we actually
reverted something.

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We've created our
initial commit,

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added a cube, reverted it.

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We can actually
reverse this commit.

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A can. So click on Yes.

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As you can see, we
can go back to Unity

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reload and we have
our cube right here.

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We will be learning
everything in minute detail.

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So give me your
entire concentration.

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This is very important.

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It's an extremely helpful video

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or lesson and we'll
stay with you

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forever as long as you
are committed to becoming

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a professional programmer
or game developer.

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So let's not waste any more
time and let's get started.

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O k. So version control

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that and put on my
laser version control.

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It's hard to learn.

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It's even harder to teach,

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but I'll try to keep it
as simple as possible.

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And when you get the hang of it,

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trust me, it's very
simple and easy to use.

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Plus it's an indispensable skill

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that you need to
learn if you are

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looking to become a
professional game developer

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or even a professional program.

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So let's get started
with what is.

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First of all, it's a
system that is responsible

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for managing changes
to computer programs.

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So this means that whenever we

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create changes in our programs,

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we can actually save

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those changes at each
step of our project.

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This way, we can first of
all check what we did.

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We can create different
kinds of versions where we

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can go back and change the
things that we've created.

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It allows for a better teamwork.

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So for example,
let's say you have

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four or five people working
on the same project,

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but each one of them has

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a different task that
they need to create.

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So version control is

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a very good way of
handling all of this.

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And why do we need it?

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Well, why we, we
actually use it?

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Well, we'll use it to
remember previous version of

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our game and have more
flexibility to experiment.

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Usually, game development is

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a environment where you

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require a lot of
experimentations.

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For example, you want
to add some kind of

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property to some kind of

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game object and maybe it
breaks your entire project.

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So you want to always
have a previous version

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of your project before adding

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this game breaking mechanic.

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So you can always go back
and start fresh from there.

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So this is extremely important,

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especially for game developers
that always need to be

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experimenting with new ideas

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and things in their
games and projects.

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And how are we going to use it?

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Well, we are going to be using

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something called source tree,

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and this is version control.

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It allows us to create
different versions.

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And its first of
all, it's for free.

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It's very easy for
beginners, very flexible,

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and it has a very
simple interface

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that we can use as beginners.

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So let's go ahead and
download source tree.

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Let me show you where
we can do that.

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If you open up

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Google Chrome or any
browser that you have,

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simply go to Google and right in

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here, download source tree.

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You should find a
link right here,

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and it should be
the source tree.

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Up.

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When you click on it, you go
right here to their website.

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If you scroll up,

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you can see that you have

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the option to
download for Windows.

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But if you are on a Mac,

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make sure that you click
on here and you download

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source tree for Mac OS or
it will not work for you.

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So if you have a Mac,

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download the Mac version,

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if you have a Windows,

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download the Windows version.

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Simple enough.

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Now, when you
finish downloading,

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you should get this
file right here.

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And when you double-click on it,

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you should start
the installation.

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Now because I already
have source tree,

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I will not be installing
it another time.

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I will just take you through

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the process of
actually installing.

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Okay, So this is

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the first window that
will pop up for you.

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First of all, you need to agree

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to the license, of course.

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And you can maybe turn this
off if you don't want any

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e-mails your way from

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source tree and et
cetera at lesson.

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Next thing you need to do is you

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need to create an
account on occasion,

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you can go to at
lysine and placing as

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the parent company
of source tree

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can go ahead and create
an account there,

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or you can use an
existing account

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if you already have a Gmail.

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I personally create
one using Gmail.

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It's much faster,
It's way easier

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and they don't spam you
with a lot of emails.

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Next thing in here,

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we are going to connect
it to an account.

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Now, this is, of course,

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we will not be doing this.

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If you want to host your code on

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a certain websites like
GitHub or Bitbucket.

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We will not be doing that,

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so you can simply click
here on skipped setup.

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Finally, while
installing source tree

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will tell you that it is
unable to locate get.

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So in order to complete this,

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simply click on Download
and embedded version

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of Git and continue on.

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And then it may also ask you

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for something
called a mercurial.

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Now, Mercurial is a different
system, just like get.

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It allows us to save different
versions of our project.

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We will not be using Mercurial,

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so you can simply click on,

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I don't want to download

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or I don't want
to use Mercurial.

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And this should be when
you finish installing.

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You should have this right here.

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And your, well, this window

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right here when you
start source tree,

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if you don't simply click
right here on Create and you

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should get this window.

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Now, this is where we actually
create our repository.

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And in here you can see that we

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have the destination path,

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the name, and the type

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of version control
that we want to use.

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Of course we'll
be using the GET.

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We also have the option
to create an account,

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but as I've told you, we're
keeping things very simple.

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It's our first time,

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so we will not be
creating any account.

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So here we are going
to choose which

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is the destination path
of our repository.

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So what, what is the project

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that we are actually going to

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be creating a repository
for subsequent versions of.

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Well, let's create
our first project

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that we are going to be using.

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So in here that's open
up the Unity Hub.

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And as you can see, we already
have Hello World that we

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don't in a previous video
that's click on New.

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And let's make sure
it's a 3D project.

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And this is going to
be our cyber spy 2087.

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Let's go ahead and
create this project.

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So click on Create.

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And I, of course,

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always using my magic of

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editing in order to
speed up this process.

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I'll see you on the other side.

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Okay, welcome back.

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So I hope everything
worked out for you.

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So now we have a new project
which is cyber spite 2087.

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So now that we have
our project created,

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we can actually go
ahead and get started

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with creating a repository.

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Now, if we go back into our
source tree right here,

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we can click on Browse

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and we can actually go
ahead into Unity projects.

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And you can see that we have

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a hello world and we have
a cyberspace by 2087.

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So let's select this folder.

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It will create a repository
under this name.

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If we hit Create,

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it will ask a problem.

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Don't worry about
it. Click on Yes.

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And voila, now we have actually

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started creating a repository.

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You have the staged
files right here.

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You have different
kinds of knobs.

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You don't need to worry
about any of them for now,

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just focus on the staged files,

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on staged files and
commit up here.

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Now, if we scroll down
in these onstage files,

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you can see that most of
them are from the library.

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We scroll down to the end,

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we can see some of them are
Tampa 10 or temporarily.

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We can see also that we have

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project settings and these are

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all the files that
we for our project.

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We also have assets in here

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for unity in the
scenes for example.

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So this is a repository which is

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a version of our
current project.

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Now, the problem here
is, as you can see,

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there are a ton
and ton of files,

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and B will not be
needing all of them.

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Well, actually we'll need
almost none of them.

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We will need only a
certain kind of files.

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So we want to be ignoring

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the library and the
temporary temporary files.

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Why is that? Well, let me
show you by opening up

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the directory of our project.

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Oh, okay, So this
is Cyberspace by

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2080 sevens directory
inside of Unity project,

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as you can see up here.

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So we have the assets,

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the library logs, packages,

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et cetera, and et cetera.

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Now, what is the temporary
folder and what is

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the library folder and why
don't we actually need them?

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So temporary is just
a way for unity to

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open up faster whenever
we start the project.

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And it's always created
whenever we open a project.

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So for example, if I
go into Unity right

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here and I actually close it,

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you'll see that the
temporary file.

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Will disappear.

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And even if we delete
the library right now,

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so let's go ahead and delete
this library entirely.

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If we go back into

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our Unity Hub and open
up cyber spy 287.

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As you can see right here,

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you saw that the library
has been created again

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and the temporary folder
has also been created.

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So of course, the project should

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take a bit more time
now to open up.

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But this is evidence that

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a library and the
temporary folders

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are not necessary for us to
always commit and stage.

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And what do I mean by stage?

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So whenever we
stage our folders,

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we actually create
a commit from them,

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any version of them.

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And library takes
up a lot of space.

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As you can see, if
we scroll down,

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it takes up most of
the space and we

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don't want any of them at all.

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So how should we proceed?

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Well, we can actually

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ignore all of the
folders that are under

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the library by simply
going and choosing

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00:11:49,580 --> 00:11:52,970
any of the folders that
have library on them.

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Right-click on it.

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And in here you can
see that we have

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the option to
ignore one of them.

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So click on ignore.

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00:12:00,185 --> 00:12:02,575
And in here you have option

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00:12:02,570 --> 00:12:04,880
to ignore this exact filename,

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00:12:04,880 --> 00:12:07,660
ignore all files
with this extension,

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or you can ignore everything
beneath a library,

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and this is what we want.

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So click on Okay.

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And as you can see,
everything under

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library has now been ignored,

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so we cannot stage it,

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so we cannot save it
to our newer version.

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00:12:23,464 --> 00:12:24,804
And if you scroll up,

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you might have noticed
that we have a new folder

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in here that is the
dot git ignore.

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00:12:30,635 --> 00:12:32,545
And when we click
on it on the right,

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you can see that it
has the library.

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And, and if we
double-click on it,

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we can actually open it
up in our notepad and in

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here we can add the
different files that

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00:12:43,670 --> 00:12:46,070
we also want to ignore.

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00:12:46,070 --> 00:12:49,430
So what are the files
that we want to ignore?

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00:12:49,430 --> 00:12:53,780
Well, there are a ton and ton
of files, but thankfully,

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00:12:53,780 --> 00:12:56,360
somebody has actually
gone through

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00:12:56,360 --> 00:12:59,870
all these files and created
a list of everything

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00:12:59,870 --> 00:13:02,330
that we can ignore
whenever creating

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00:13:02,330 --> 00:13:06,290
version controls or
versions of our project.

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00:13:06,289 --> 00:13:08,259
And in order to find that file,

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you can go again and to
Google or the front.

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Go ahead and search
dot git, ignore unity.

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00:13:14,645 --> 00:13:16,915
And you should have
this link right

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00:13:16,910 --> 00:13:19,820
here for the github.com.

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00:13:19,820 --> 00:13:22,090
And it will be hosted on GitHub.

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00:13:22,085 --> 00:13:23,795
If you open up this link,

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00:13:23,795 --> 00:13:25,585
it will take you right here.

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00:13:25,580 --> 00:13:27,830
So this is the dot
gitignore and it's

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the unity dot git ignore.

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00:13:30,305 --> 00:13:33,725
And these are all the
files that we can ignore

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00:13:33,725 --> 00:13:37,955
when creating versions
of our project.

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You can click on row right here,

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00:13:40,535 --> 00:13:44,375
and it will open up
this window or tab.

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Let's go ahead and select all

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of them by clicking
on control a.

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We will copy all of this using

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00:13:50,960 --> 00:13:53,540
control C. And we are going

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to paste it in here in our
dot gitignore notepad.

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00:13:58,970 --> 00:14:03,110
And now we have the
gitignore notepad filled

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00:14:03,110 --> 00:14:05,090
with all the files that we will

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00:14:05,090 --> 00:14:07,450
not use for our positive 3.

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00:14:07,445 --> 00:14:10,615
We will save that
using Control S.

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00:14:10,610 --> 00:14:14,210
And now back in Unity or I
mean back in source tree,

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you can see that when we had

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the git ignore,
everything is ignored.

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00:14:18,770 --> 00:14:21,230
We will stage all of that.

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00:14:21,230 --> 00:14:23,090
And when we stage all of that,

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you can see that these
are the files that

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00:14:24,905 --> 00:14:27,145
are going to be committed.

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00:14:27,140 --> 00:14:30,350
And these would be our
initial commitment or

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00:14:30,350 --> 00:14:35,410
our initial repository
version of the project.

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00:14:35,405 --> 00:14:38,755
And usually whenever you
create your initial commit,

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00:14:38,750 --> 00:14:41,030
we call this the initial.

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00:14:41,030 --> 00:14:42,970
You can capitalize it,

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00:14:42,965 --> 00:14:48,565
the initial, oops,
initial commit.

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00:14:48,560 --> 00:14:51,820
And we click on
Commit right here.

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00:14:51,815 --> 00:14:54,515
So now if you look on the left,

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you can see that we have
branches under here and

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00:14:57,110 --> 00:14:59,800
we have the master branch.

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00:14:59,795 --> 00:15:04,135
Congratulations, we have
created our first commitment.

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00:15:04,130 --> 00:15:07,190
Very nice. Now, let me just

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00:15:07,190 --> 00:15:10,720
show you how we will move
further down the line,

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00:15:10,715 --> 00:15:12,895
even though this video
has been long enough.

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00:15:12,890 --> 00:15:17,210
But I think we need to
get a proper foundation

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00:15:17,210 --> 00:15:18,770
for source tree and

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00:15:18,770 --> 00:15:22,120
version control as we
move through our project.

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00:15:22,115 --> 00:15:25,325
So let's say we are in
our project right here.

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00:15:25,325 --> 00:15:28,925
And let's go ahead and
create some kind of cubes.

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00:15:28,925 --> 00:15:30,455
3d object.

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00:15:30,455 --> 00:15:32,525
Right-click in the hierarchy.

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00:15:32,525 --> 00:15:34,865
3d object, create a cube,

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00:15:34,865 --> 00:15:36,535
and now we have a cube.

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00:15:36,530 --> 00:15:38,480
Let's scale it up a bit.

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00:15:38,480 --> 00:15:39,830
So scale it on the x,

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00:15:39,830 --> 00:15:41,420
the y, and the z.

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00:15:41,420 --> 00:15:42,140
Great.

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00:15:42,140 --> 00:15:45,470
So now we have a
cube and our scene.

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00:15:45,470 --> 00:15:47,690
And now if we go
into source tree,

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00:15:47,690 --> 00:15:49,660
let's save that before we go.

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00:15:49,655 --> 00:15:52,475
And it needs to save
it to a certain scene.

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00:15:52,475 --> 00:15:54,755
So let's inside of scenes.

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00:15:54,755 --> 00:15:56,945
This will be our sample scene.

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00:15:56,945 --> 00:15:59,815
Sure. Sample scene,
yes, replace it.

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00:15:59,810 --> 00:16:04,270
So we have this sample
scene back and source tree.

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00:16:04,265 --> 00:16:06,595
Wait for it a bit,
and you can see that

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00:16:06,590 --> 00:16:08,800
we have uncommitted changes.

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00:16:08,795 --> 00:16:10,085
So if we click on them,

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00:16:10,085 --> 00:16:12,565
you can see that the
on-stage files are

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00:16:12,560 --> 00:16:15,920
changes inside of the scenes,

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00:16:15,920 --> 00:16:17,650
which is the sample scene.

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00:16:17,645 --> 00:16:20,995
And here you can look in
detail what we've created now.

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00:16:20,990 --> 00:16:23,480
It's a bit weird right here,

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00:16:23,480 --> 00:16:24,620
but if you look closely,

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00:16:24,620 --> 00:16:26,960
you can see that we've
created box collider.

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00:16:26,960 --> 00:16:29,270
And basically this
represents the cube

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00:16:29,270 --> 00:16:31,880
that we've added to our scene.

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00:16:31,880 --> 00:16:34,690
So let's go ahead and
stage all of that.

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00:16:34,685 --> 00:16:37,825
We can click on
Commit right here and

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00:16:37,820 --> 00:16:41,230
name this added a cube.

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00:16:41,225 --> 00:16:43,135
Click on comment.

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00:16:43,130 --> 00:16:45,200
And now in our master branch,

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00:16:45,200 --> 00:16:47,230
you can see that we
have an initial commit

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00:16:47,225 --> 00:16:49,345
which didn't have any cubed.

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00:16:49,340 --> 00:16:51,470
And now in our added cube,

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00:16:51,470 --> 00:16:54,770
we've added a cube.

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00:16:54,770 --> 00:16:56,720
So congratulations.

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00:16:56,720 --> 00:16:59,710
And as a final note,

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00:16:59,705 --> 00:17:02,005
this may look a bit cumbersome.

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00:17:02,000 --> 00:17:03,620
This may look a bit weird,

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00:17:03,620 --> 00:17:06,470
but don't be afraid
this is very simple.

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00:17:06,470 --> 00:17:10,970
And more importantly, it's
extremely important for us to

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00:17:10,970 --> 00:17:15,500
understand as we move
through our project,

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00:17:15,499 --> 00:17:17,809
create versions, versions of it.

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00:17:17,810 --> 00:17:20,030
And if we ever make a mistake,

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00:17:20,030 --> 00:17:21,800
we can actually go back by

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00:17:21,800 --> 00:17:25,090
right-clicking in here,
reversing the commit.

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00:17:25,085 --> 00:17:27,145
And yes, we can reverse

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00:17:27,140 --> 00:17:29,840
the commit if we go
back and to unity,

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00:17:29,840 --> 00:17:31,780
it will ask us for
a live reload.

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00:17:31,775 --> 00:17:33,485
We wrote, we reload,

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00:17:33,485 --> 00:17:36,625
and now we don't
have the cube or any

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00:17:36,620 --> 00:17:39,920
game breaking mechanic that
we've added along the way.

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00:17:39,920 --> 00:17:44,260
And now it's time
for your challenge.

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00:17:44,255 --> 00:17:47,155
Your challenge is going
to be to download and

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00:17:47,150 --> 00:17:50,540
setup source tree
and the ignore file.

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00:17:50,540 --> 00:17:54,530
So download source tree and
stall and setup everything.

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00:17:54,529 --> 00:17:57,249
Create your 3D
project in Unity Hub,

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00:17:57,245 --> 00:18:00,415
setup a repository for
it and source tree,

401
00:18:00,410 --> 00:18:02,810
nor the library files and get

402
00:18:02,810 --> 00:18:06,080
the dot ignore file and
add it to your repository,

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00:18:06,080 --> 00:18:07,760
create your first commit,

404
00:18:07,760 --> 00:18:10,000
and then create
your second commit.

405
00:18:09,995 --> 00:18:12,055
You can even go ahead and try to

406
00:18:12,050 --> 00:18:14,290
maybe play around with
a couple of things.

407
00:18:14,285 --> 00:18:17,665
Add a cube, reversed the
commit, see what happens.

408
00:18:17,660 --> 00:18:19,840
Get comfortable
with source tree.

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00:18:19,835 --> 00:18:22,555
And if you're having
a bit of trouble,

410
00:18:22,550 --> 00:18:24,620
you can pause the
video on this list

411
00:18:24,620 --> 00:18:26,990
of things that you
need to create.

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00:18:26,990 --> 00:18:28,790
And you can also always go

413
00:18:28,790 --> 00:18:30,410
back and watch the video and see

414
00:18:30,410 --> 00:18:32,270
how I made everything and

415
00:18:32,270 --> 00:18:34,240
follow along with
me step-by-step.

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00:18:34,235 --> 00:18:38,165
So see you in just a bit.